Potter Releasing Systems - Manual (Page 17)

17
Straight Pipe Riser Waterflow And Supervisory Switch Installation
(Main Riser Flow Switch)
Fig. 1
Branch Line Flow Switch
Fig. 2
SYSTEM PRESSURE
SUPPLY PRESSURE
24” MIN.
VSR
DRAIN
PCVS
OS & Y FLOOR CONTROL VALVE (OPEN)
AND
OSYSU SUPERVISORY SWITCH
VSR
FEED MAIN
DRAIN VALVE (CLOSED)
TEST VALVE (CLOSED)
SIGHT GLASS SYSTEM RISER
UNION WITH
RESTRICTED
OPENING
SAME SIZE AS
SPRINKLER
HEAD
TO DRAIN